MenuSorter: forgot to add plugin style change
MenuSorter: worked out the final quirks
* Menu always compressed into tables without missing indexes for ipairs compatibility
* Orphans attached
* Separators no longer count as items
All the explicite self:saveSettings() needed are done when needed,
and this onSaveSettings() made the file being rewritten unchanged on
each suspend/exit, and created even if people have never used the
plugin.
